How to determine a radio wave's frequency from electrical signal?
If I send an electrical signal through an antenna and create radio waves, how do I know the frequency of the wave that's been made? Can I figure it out from the voltage of the electrical signal, or do I need to measure the wave after it's been emitted?
- daniel gLv 71 year agoFavorite Answer
Spectrum analyzer is the only thing I know. Some frequency counters go to VHF frequencies.
Yea, look at the period of the signal with an Oscope and calculate frequency.
- 異域秦後人Lv 71 year ago
Use a scope or frequency counter to determine the frequency.
- ZirpLv 71 year ago
the frequency of the wave is the frequency of the alternating current.
Voltage is irrelevant
- I'm StupidLv 61 year ago
You would need to know the carrier frequency before hand. An electrical signal will be modulated before it gets transmitted. When the signal reaches the receivers it get demodulated back to a electrical signal.
Just like a radio station. You will need to know what frequency it uses and then tune the radio to the correct frequency. Otherwise you will get static noise.